VALVE GP-BANK 6E4781 - Caterpillar

To prevent possible personal injury, make sure all the pressure is released from the hydraulic system before any lines are disconnected.
1. Drain the oil from the hydraulic tank.2. Lower the front guard.3. Disconnect all hydraulic hoses (1) from the control valve. Remove mounting bolts (3) to remove push-pull control valve (2). The following steps are for the installation of the push-pull control valve.4. Put push-pull control valve (2) in position with mounting bolts (3).5. Connect hydraulic hoses (1).Disassemble Push-Pull Control Valve
Start By:a. remove push-pull control valve 1. Remove bolts (1) and relief valve body (2) from the push-pull control valve. 2. Remove plug (9), shims (4), dowel (5), spring (6), valve (7) and seat (8) from the relief valve body.3. If necessary, remove seals (3) and (10) from the plug and the seat. 4. Remove check valve body (11) from connector (12). 5. Remove valve (15) and spring (14) from clutch valve body (11).6. If necessary, remove the spacers from connector (12).7. Remove connector (12) from valve body (16).8. If necessary, remove seals (13) from the connector. 9. Remove pilot valve body (17) from valve body (16). 10. Remove spool (18), shims (21), spring (19) and valve (22) from pilot valve body (17) and valve body (16).11. If necessary, remove seals (20) from pilot valve body (17). 12. If necessary, remove seat (23) from the valve body. 13. Remove bolts (24) and valve body (16) from the push-pull control valve. 14. Remove plug (27), spring (26) and valve (25) from valve body (16).15. If necessary, remove seat (28) from plug (27). 16. Remove plug (29), spring (30) and spool (31) from push-pull valve body (37).17. If necessary, remove the seal from plug (29).18. Remove plug (33), spring (34), retainer (35) and valve (36) from push-pull valve body (37).19. If necessary, remove the seal from plug (33).20. Remove plug (38) from push-pull valve body (37).21. If necessary, remove seal (32) from plug (38).Assemble Push-Pull Control Valve
1. Inspect all seals for wear or damage, and make a replacement if necessary.2. Install seal (4) on plug (5). Install plug (5) in push-pull valve body (10).3. Install the seal on plug (1).4. Install spool (3) in push-pull valve body (10). Make sure the clearance between the spool and the valve body is not less than 0.015 mm (.0006 in.) or more than 0.020 mm (.0008 in.).5. Install spring (2) and plug (1) in push-pull valve body (10).6. Install the seal on plug (6).7. Install valve (9) in push-pull valve body (10). Make sure the clearance between the valve and the valve body is not less than 0.020 mm (.0008 in.) or more than 0.030 mm (.0012 in.).8. Install retainer (8), spring (7) and plug (6) in push-pull valve body (10). 9. Install seal (14) on plug (15).10. Install valve (11) in valve body (12). Make sure the clearance between the valve and the valve body is not less than 0.023 mm (.0009 in.) or more than 0.030 mm (.0012 in.).11. Install spring